Underwater sound from dredging activities: establishing source levels and modelling the propagation of underwater sound

Underwater sound from dredging activities: establishing source levels and modelling the propagation of underwater sound.
Jones, D.and Marten, K. and Harris, K.
In: CEDA Dredging days 2015, 5-6 November 2015, Rotterdam, the Netherlands. (2015)

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Official URL:https://dredging.org/digitallibrary/abstract.asp?menu=&v0=1021
Abstract:Underwater sound from anthropogenic sources and its potential adverse effects on the marine environment is a topic of much global interest. Concerns regarding anthropogenic underwater sound have historically been concerned with sonar from military activities, seismic survey work and percussive pile driving; however in recent years there has been a recognition that sound from some shipping and dredging activities could also impact on the marine environment. Dredging activities emit underwater sound into the marine environment. Monitoring of sound from dredging equipment is often carried out for an individual project and usually only to support research; however, due to the way in which sound interacts with the marine environment the propagation of sound from individual dredging vessels will vary depending on the activity and location of the dredging. The level of sound at the dredger, termed the source level, will also vary between dredgers due to a range of different environmental and mechanical factors. In this paper we present a brief review of the known sound source levels for various dredging equipment and activities, describe a method used to extrapolate source levels based on the pump power when a source level has not been directly measured, and describe how this information is used to predict the propagation of sound from dredging activities using numerical modelling tools.
Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Underwater sound, source level, dredge vessel, numerical model
Subjects:Coasts > General
Coasts > Aggregate dredging
Water > General
ID Code:1354
Deposited On:14 Dec 2016 11:18
Last Modified:11 Oct 2017 12:09

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